JPH0921580A - Icemaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost by simplifying the rotation of an ice scraping member and a driving system for fluidizing liquid. SOLUTION: A refrigerant flowing unit for fluidizing refrigerant for generating ice is attached to the outer periphery of a casing 1 with an ice generating surface F for generating ice overlying the inner periphery, a drive shaft 3 is rotatably provided in the casing 1, an ice scraping member 4 for scraping ice formed on the ice forming surface is integrally rotatably mounted at the shaft 3, and a cylindrical pump shaft 7 is externally relatively rotatably engaged with the shaft 3 at one end side of the shaft 3 in the longitudinal direction. A blade 8 for transferring liquid from an inlet 5 to an outlet 6 is integrally rotatably mounted in the state that disposed in the casing 1 at the shaft 7, and the same elector motor 9 is so coupled to be interlocked to the shafts 3, 7 as to rotate the shaft 7 faster than the shaft 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system for making ice using nighttime electric power, storing the ice made, and using the ice stored in the daytime as a heat source for cooling. A cooling medium flow part for flowing a cooling medium for ice generation is attached to the outer peripheral surface of the casing having an ice generation surface for generating ice on the peripheral surface, and a drive shaft is rotatably provided in the casing, and the drive shaft is An ice recovery member for recovering the ice generated on the ice generation surface is integrally rotatably mounted, and a casing is provided with an inlet for the liquid to be frozen and an outlet for the ice-containing liquid and a tank for storing the ice-containing liquid. Related to ice making equipment.

[0002]

2. Description of the Related Art As an ice making device as described above, generally, as shown in the overall schematic configuration diagram of FIG. 8, an outer peripheral surface of a casing 01 having an ice generating surface F for generating ice on the inner peripheral surface is generally used. A large-diameter cylindrical body 02 is externally fitted to form a refrigerant flowing portion for flowing a refrigerant for ice generation in a space between the outer peripheral surface of the casing 01 and the inner peripheral surface of the cylindrical body 02, and the inside of the casing 01 is formed. The drive shaft 03 is rotatably mounted on the drive shaft 03, the ice recovery member 04 is attached to the drive shaft 03 so as to rotate integrally, and the drive shaft 03 and the electric motor 05 are interlockingly connected via a belt type transmission mechanism 06. Has been done. Further, an inflow port 07 formed in the casing 01 and a tank 08 for storing ice are connected through a feed pipe 010 having a pump 09, and an outflow port 011 formed in the casing 01.
And the tank 08 are connected via a return pipe 012. The outer peripheral surfaces of the cylindrical body 02, the feed pipe 010, the tank 08, and the return pipe 012 are covered with a heat insulating material 013.

With these constructions, the refrigerant flows and the icing liquid such as brine flows into the casing 01 through the inflow port 07 to produce ice on the ice producing surface F, and the ice collecting members 04 ... Are rotated. Then, the ice generated on the ice generation surface F is recovered, the ice-containing liquid is supplied from the outlet 011 to the tank 08, and a predetermined amount of ice is stored in the tank 08.

[0004]

However, the conventional ice making device as described above requires the electric motor 05 for driving and rotating the ice recovery member 04 and the device for driving the pump 09, and further, A seal structure for connecting the pipe 010 and the pump 09 is required, and the number of constituent members is large, which is expensive, and maintenance is troublesome.

The present invention has been made in view of the above circumstances, and the ice making device according to the first aspect of the present invention simplifies the drive system for rotating the ice recovery member and flowing the liquid, and is inexpensive. In the ice making device according to the second and third aspects of the present invention, the drive system for rotating the ice recovery member and the liquid flow is configured to be compact, and the entire device is miniaturized. The purpose is to enable
Further, an object of the ice making device of the invention according to claim 4 is to simplify the piping system and to make the cost even lower.

[0006]

The invention according to claim 1 is
In order to achieve the above-mentioned object, a refrigerant flow part for flowing a refrigerant for ice generation is attached to the outer peripheral surface of a casing having an ice generation surface for generating ice on the inner peripheral surface, and is driven in the casing. The shaft is rotatably mounted, and the drive shaft is integrally rotatably mounted with an ice recovery member for recovering the ice generated on the ice generation surface, and the casing has an inlet for the liquid to be frozen and an outlet for the liquid containing ice. In the ice making device provided with and a tank for storing the ice-containing liquid, a pump shaft is provided so as to be rotatable relative to the drive shaft, and the pump shaft is located in the casing, and from the inlet to the outlet. A blade body for transferring a liquid is integrally rotatably mounted, and the same drive mechanism is interlocked and connected to the drive shaft and the pump shaft so that the pump shaft rotates faster than the drive shaft.

The ice making device of the invention according to claim 2 is
In order to achieve the above-mentioned object, the pump shaft in the ice making device of the invention according to claim 1 is formed of a cylindrical shaft, and the pump shaft is fitted to one end side in the longitudinal direction of the drive shaft so as to be relatively rotatable. Configure.

The ice making device of the invention according to claim 3 is
In order to achieve the above object, the drive shaft in the ice making device according to the first aspect of the present invention is configured by a cylindrical shaft, and the pump shaft is internally fitted to the drive shaft so as to be relatively rotatable.

The ice making device of the invention according to claim 4 is
In order to achieve the above-mentioned object, the casing in the ice making device according to any one of claims 1, 2 and 3 is provided in the tank with the inlet located on the bottom side. Configure.

[0010]

According to the structure of the ice making device of the present invention, the pump shaft is driven by the same drive mechanism so that the pump shaft rotates faster than the drive shaft, and the pump shaft is located in the casing. The blade body provided in the above allows the liquid to flow in the casing to generate ice on the ice generation surface of the inner peripheral surface of the casing, and the ice recovery member recovers the ice, and supplies the obtained ice-containing liquid to the tank. Can store ice.

Further, according to the structure of the ice making device of the present invention according to claim 2 and claim 3, the pump shaft and the drive shaft have a double shaft structure, and the pump shaft rotates at a higher speed than the drive shaft. Driven by the same drive mechanism as described above, the liquid is caused to flow in the casing to generate ice on the ice generating surface of the inner peripheral surface of the casing and the ice is recovered by the ice recovery member,
The obtained ice-containing liquid can be supplied to a tank to store ice.

Further, according to the structure of the ice making device of the invention as claimed in claim 4, the liquid to be iced in the tank is caused to flow directly into the casing from the inlet, and the obtained ice-containing liquid is directly supplied from the outlet. Can be discharged into the tank.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall schematic vertical sectional view showing a first embodiment of an ice making device according to the present invention, and FIG. 2 is a transverse sectional view, in which ice is generated on an inner peripheral surface by a minute jagged roughness. A large-diameter cylindrical body 2 is externally fitted to the outer peripheral surface of the casing 1 on which the ice generating surface F is formed, and a refrigerant for ice generation is provided in a space S between the outer peripheral surface of the casing 1 and the inner peripheral surface of the cylindrical body 2. The ice making section A is formed by forming a refrigerant flowing section that flows through the ice making section.

A drive shaft 3 is rotatably provided in the casing 1 with one end side in the longitudinal direction thereof protruding to the outside, and an ice recovery member 4 ... Is attached to the drive shaft 3 so as to be integrally rotatable. . This ice recovery member 4 ... is located at a position close to the roughness peak portion in the supercooled state, by contacting the ice generated by the roughness peak portion described above as the ice core. By stirring and flowing the liquid to be frozen, the ice generated at the roughness peaks and the vicinity thereof is separated from the inner peripheral surface of the casing 1 and collected.

An inflow port 5 for inflowing the liquid to be frozen is formed on one end side in the longitudinal direction of the casing 1, and an outflow port 6 for outflowing the ice-containing liquid is formed on the other end side in the longitudinal direction. On the side near the outlet 6 in the casing 1,
A tubular pump shaft 7 is fitted onto the drive shaft 3 so as to be relatively rotatable, and a vane body 8 that transfers liquid from the inflow port 5 to the outflow port 6 is integrally rotatably attached to the pump shaft 7. .

One end side of each of the drive shaft 3 and the pump shaft 7 in the longitudinal direction is projected to the outside of the casing 1, and the drive shaft 3 and the pump shaft 7 each have an electric motor 9 as a first drive mechanism. And the second gear type transmission mechanism 10,
It is interlockingly connected via 11. The first gear type transmission mechanism 10 meshes a large-diameter gear 10a attached to the drive shaft 3 and a small-diameter gear 10b attached to the motor shaft 12 of the electric motor 9, and sets the ice recovery member 4 ... within 400 to 500 rpm. It is configured to rotate at a predetermined rotation speed. On the other hand, the second gear type transmission mechanism 11 includes the gear 11 attached to the pump shaft 7.
a and a gear 11 attached to the motor shaft 12 of the electric motor 9
b with the blade body 8 at a higher speed than the ice collecting member 4 ...
It is configured to rotate at a predetermined rotation speed within 1800 to 3600 rpm.

The inflow port 5 and the outflow port 6 and the ice storage tank 13 are connected to each other through the feed pipe 14 and the return pipe 15, respectively, and by the rotation of the blade body 8,
The liquid to be frozen is made to flow into the casing 1 from the inside of the tank 13 through the inflow port 5, and the obtained ice-containing liquid is supplied to the tank 13 from the inside of the casing 1 through the outflow port 6. Although not shown, as in the case of the conventional example (see FIG. 7), the cylindrical body 2, the tank 13,
The outer peripheral surface of each of the feed pipe 14 and the return pipe 15 is covered with a heat insulating material.

As shown in the circuit diagram of FIG. 3, the electric motor 9
A current detector 18 is attached to an electric wire 17 that connects a power source (AC power supply 200V) 16 to the power source. A microcomputer 20 is connected to the current detector 18 via an amplifier 19, and the lamp L is connected to the microcomputer 20. Are connected.

The microcomputer 20 is provided with a current change width calculating means 21, a comparing means 22 and a blinking means 23. The current change width calculating means 21 inputs the detection current from the amplifier 19 at each set time and calculates the difference between the minimum value and the maximum value, that is, the current change width. Further, the comparison unit 22 compares the current change width calculated by the current change width calculation unit 21 with the set value from the setter 24, and the calculated current change width is set to a set value (for example,
When a current value before the occurrence of image sticking due to overcurrent, such as 1 ampere, is set), a command signal is output. The blinking means 23 outputs a blinking signal to the lamp L in response to the command signal from the comparing means 22 to blink the lamp L.

When the roughness forming the ice-producing surface F on the inner peripheral surface of the casing 1 is worn, it becomes difficult for the ice to come off and the resistance applied to the ice collecting member 4 increases, and the electric motor 9 is overloaded. If an electric current is left as it is, the electric motor 9 may be burned and the ice making operation may be stopped. In particular, when the ice storage system is used in the air conditioning system to store the ice heat by using the electric power at night, the ice making operation is performed at midnight, so that it is difficult to quickly repair the operation when the operation is stopped. In view of such an actual situation, with the above-mentioned configuration, the risk of overcurrent is detected, the fact is notified by blinking the lamp L, the abnormality is detected before the burn-in occurs, and the replacement is performed during the daytime when the operation is not hindered. Then, it is possible to take appropriate measures such as forming roughness again. The blinking signal may be transmitted to a manufacturer or a maintenance company through a telephone line so that more detailed service can be provided.

Next, an air conditioning system constructed by using the ice making device of the first embodiment will be described. As shown in the system configuration diagram of FIG. 4, the suction side pipe R1 and the discharge side pipe R2 of the compressor 26 are connected to a plurality of indoor side heat exchangers 25 ... First
The four-way switching valve 27 and the outdoor heat exchanger 28 are connected to each other via the second pipe R4. The outdoor heat exchanger 28 and the indoor heat exchanger 25 ... Are connected to each other via a third pipe R5 in which a first expansion valve F1 and a second expansion valve F2 ... Are connected in series. .

The first expansion valve F1 in the third pipe R5
Between the second expansion valve F2 and the suction side pipe R
1 is connected through a first bypass pipe B1 in which a third expansion valve F3 and a one-way valve C1 are provided in parallel with each other and a first opening / closing valve V1 is provided, and Is provided with an ice making section A of the ice making device, and the first on-off valve V1 of the first bypass pipe B1 is provided.
The second bypass pipe B in which the second opening / closing valve V2 is interposed between the portion between the ice making unit A and the intermediate portion of the first pipe R3.
2 are connected.

With this configuration, the liquid to be iced flows from the tank 13 into the ice making section A through the feed pipe 14 and the ice-containing liquid is supplied into the tank 13 through the return pipe 15, while the compressor 26 supplies the ice-containing liquid to the chamber. The refrigerant that has passed through the outer heat exchanger 28 is supplied to the ice making unit A, and the ice making unit A acts as an evaporator to generate ice, and the ice can be stored in the tank 13. Further, the refrigerant is supplied from the compressor 26 to the outdoor heat exchanger 28 through the ice making section A, and the ice making section A acts as a condenser to obtain hot water, and the hot water can be stored in the tank 13. Is configured.

As the refrigerant, a refrigerant capable of phase-changing between liquid and gas is used, and the refrigerant that has changed phase into liquid is heat-exchanged between the ice making section A and the indoor heat exchanger 25. A head difference sufficient for transfer to the container 25 is provided, and the refrigerant is naturally circulated and flows between the ice making section A and the indoor heat exchanger 25, and the indoor heat exchanger 25 is used by using the ice stored in the tank 13. It is configured so that it can be cooled by. FIG.
In the above, known components such as a receiver for accumulating the refrigerant liquid, an accumulator, a suction heat exchanger, and the like provided for pressure adjustment are omitted. As the refrigerant, for example, harmless Freon gas R22 or Freon gas R134A containing no chlorine is used.

With the above configuration, the four-way switching valve 27 and the first
And the second opening / closing valves V1 and V2 are opened or closed artificially or automatically to make ice in the ice making section A and store the ice in the tank 13, an ice making / heating operation state in which heating is performed while ice making is performed, The ice stored in the tank 13 is used to naturally circulate the refrigerant for cooling for heat storage operation, the compressor 26 forcibly circulates the refrigerant for cooling for cooling, and the outdoor heat exchanger 28 is liquefied. Refrigerant and ice making part A
Refrigerant merging and cooling operation state in which natural cooling and forced circulation are used together while merging with the refrigerant liquefied in 1., hot water heat storage operation state in which hot water is stored in the tank 13 by causing the ice making unit A to act as a condenser, In order to obtain the heat storage heating operation state in which heating is performed using the hot water stored in 13, and the heating operation state in which the refrigerant is forcibly circulated through the outdoor heat exchanger 28 and the indoor heat exchanger 25, to perform heating. It has become.

FIG. 5 is an overall schematic vertical sectional view showing a second embodiment of the ice making device according to the present invention. The difference from the first embodiment is as follows. That is, the casing 1 is
It is arranged at a central portion in the tank 13 with its longitudinal direction oriented in the vertical direction, and is configured so that the blade body 8 is located on the lower end side of the casing 1, and the lower portion of the casing 1 is supported by the support stay 29. At the same time, the inflow port 30 is formed therein, and the upper end of the casing 1 is opened to form the outflow port 31.

The drive shaft 3 and the pump shaft 7 penetrate through the bottom wall 13a of the tank 13 and project through the seal mechanism 32, the electric motor 9 is provided below the bottom wall 13a, and the first and second shafts are provided. Gear type transmission mechanism 10,1
It is interlocked with the drive shaft 3 and the pump shaft 7 via 1. In the figure, 33 and 34 are spaces S that constitute the refrigerant flow section.
The refrigerant piping for supplying and discharging the refrigerant is shown in FIG. The other configuration is the same as that of the first embodiment, and the same drawing number is assigned and the description is omitted.

According to the second embodiment, since the casing 1 is provided in the tank 13, the feed pipe connecting each of the inflow port 5 and the outflow port 6 and the tank 13 as in the first embodiment. 14 and the return pipe 15 are not required, and the outer surface of the tank 13 may be covered with a heat insulating material, so that the amount of the heat insulating material used can be reduced, and the structure can be simple and inexpensive.

FIG. 6 is an overall schematic vertical sectional view showing a third embodiment of the ice making device according to the present invention. The difference from the second embodiment is as follows. That is, the drive shaft 3 is formed of a cylindrical shaft, the pump shaft 7 is fitted in the drive shaft 3, and the lower end of the pump shaft 7 is provided on the bottom wall 13a of the tank 13 without penetrating the bottom wall 13a. It is rotatably supported by the bearing member 35.

The drive shaft 3 and the pump shaft 7 penetrate the top plate 13b of the tank 13 and project through the bearing 36, the electric motor 9 is provided above the top plate 13b, and the first and second belts are provided. Type transmission mechanism 37, 38
It is interlockingly connected to the drive shaft 3 and the pump shaft 7 via. The other structure is the same as that of the second embodiment, and the same drawing numbers are given and the description thereof is omitted.

According to the third embodiment, since the drive shaft 3 and the pump shaft 7 are not penetrated from the bottom wall 13a of the tank 13, the seal mechanism 32 as in the second embodiment is unnecessary, and the cost is further reduced. There is an advantage that can be done.

FIG. 7 is an overall schematic vertical sectional view showing a fourth embodiment of the ice making device according to the present invention. The difference from the first embodiment is as follows. That is, at a position near the inlet port 5 of the casing 1, the pump shaft 7 is mounted between the bearing member 39 and the drive shaft 3 in parallel, and one end of each of the drive shaft 3 and the pump shaft 7 is attached to the casing 1.
Of the large-diameter gear 40 to the drive shaft 3 outside the casing 1.
The small-diameter gears 41 are attached to the pump shaft 7 and are engaged with each other, and the blade body 8 is integrally rotatably attached to the pump shaft 7 in the casing 1. The other configuration is the same as that of the first embodiment, and the same drawing number is assigned and the description is omitted.

[0034]

As described above, according to the ice making device of the inventions of claims 1 and 3, since the pump shaft and the drive shaft are driven by the same drive mechanism, the rotation of the ice recovery member is prevented. The drive system for flowing the liquid can be simplified and the cost can be reduced. Moreover, since the pump shaft rotates at a higher speed than the drive shaft, the flow rate of the liquid and the recovery of ice can be set in desired states, and the ice making performance is not deteriorated. Moreover, since the pump is incorporated in the casing, it is not necessary to separately install the casing and the pump, which is advantageous in terms of installation, and the number of sealing members is reduced because the pump and the pipe are not connected. It is less expensive, easier to maintain, and cheaper.

Further, according to the ice making device of the present invention as defined in claims 2 and 3, one of the pump shaft and the drive shaft is a cylindrical shaft, and the other shaft is internally fitted to form a double shaft structure. Therefore, the drive system can be made compact and the entire device can be made compact.

Further, according to the structure of the ice making device of the invention as claimed in claim 4, the liquid to be frozen in the tank is caused to flow directly into the casing from the inlet, and the obtained ice-containing liquid is directly supplied from the outlet. Since it outflows into the tank, it is possible to eliminate the need for pipes that connect the tank to the inflow port and the outflow port, and to further reduce the cost.

[Brief description of drawings]

FIG. 1 is an overall schematic vertical sectional view showing a first embodiment of an ice making device according to the present invention.

FIG. 2 is a cross section of FIG.

FIG. 3 is a block diagram.

FIG. 4 is an overall system configuration diagram showing an air conditioning system using the ice making device of the first embodiment.

FIG. 5 is an overall schematic vertical sectional view showing a second embodiment of the ice making device according to the present invention.

FIG. 6 is an overall schematic vertical sectional view showing a third embodiment of the ice making device according to the present invention.

FIG. 7 is an overall schematic vertical sectional view showing a fourth embodiment of the ice making device according to the present invention.

FIG. 8 is an overall schematic longitudinal sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Casing 3 ... Drive shaft 4 ... Ice recovery member 5 ... Inflow port 6 ... Outflow port 7 ... Pump shaft 8 ... Impeller 9 ... Electric motor as a drive mechanism 13 ... Tank F ... Ice generation surface S ... As a refrigerant flow part Space

Claims (4)

[Claims] 1. A refrigerant flow part for flowing a refrigerant for ice generation is attached to an outer peripheral surface of a casing having an ice generating surface for generating ice on an inner peripheral surface, and a drive shaft is rotatably provided in the casing. At the same time, an ice recovery member for recovering ice generated on the ice generation surface is integrally rotatably attached to the drive shaft, and an inlet for an iced liquid and an outlet for an ice-containing liquid are provided on the casing. In an ice making device provided with a tank for storing an ice-containing liquid, a pump shaft is provided so as to be rotatable relative to the drive shaft, and the pump shaft is located in the casing, and the flow path is changed from the inlet to the outlet. A blade body that transfers liquid is integrally rotatably attached, and the same drive mechanism is interlocked and connected to the drive shaft and the pump shaft so that the pump shaft rotates faster than the drive shaft. Ice making apparatus according to claim Rukoto. 2. An ice making device in which the pump shaft according to claim 1 is a cylindrical shaft, and the pump shaft is externally fitted to one end side in the longitudinal direction of the drive shaft so as to be relatively rotatable. 3. An ice making device in which the drive shaft according to claim 1 is a cylindrical shaft, and a pump shaft is fitted in the drive shaft so as to be relatively rotatable. 4. An ice making device in which the casing according to claim 1, 2, or 3 is provided in a tank with an inlet located on the bottom side.